Remove memory category from chrome://tracing

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 8f93e6776a575a5a532d7e4e7d6403f81c95c7d7..db7c3e57594e3bca06573d2c41ed9260982b758a 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -699,13 +699,6 @@ void BrowserMainLoop::PostMainMessageLoopStart() {
       skia::SkiaMemoryDumpProvider::GetInstance(), "Skia", nullptr);
   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
       sql::SqlMemoryDumpProvider::GetInstance(), "Sql", nullptr);
-
-#if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
-  trace_memory_controller_.reset(new base::trace_event::TraceMemoryController(
-      base::MessageLoop::current()->task_runner(),
-      ::HeapProfilerWithPseudoStackStart, ::HeapProfilerStop,
-      ::GetHeapProfile));
-#endif
 }
 
 int BrowserMainLoop::PreCreateThreads() {
@@ -1007,7 +1000,6 @@ void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
   aura::Env::DeleteInstance();
 #endif
 
-  trace_memory_controller_.reset();
   system_stats_monitor_.reset();
 
 #if !defined(OS_IOS)